How to set the Clock
1) Press and release the set button to enter the menu system (the far right button).
2) Repeatedly press and release the down button until the LCD shows "SET CLK".
3) Press and release the set button to start setting the clock,
4) Use the up and down buttons to set the hours, and press the set button when finished.
5) Use the up and down buttons to set the hours, and press the set button when finished.

How to change between MPH to KPH
1) Press and release the set button to enter the menu system (the far right button).
2) Repeatedly press and release the down button until the LCD shows "UNIT IS".
3) If the "kph" symbol is shown next to the "IS" on the LCD, the gauge is set to KPH and kilometers. If the "mph" symbol is shown next to the "IS" on the LCD, then the gauge is set to MPH and miles. To switch the gauge simply press the set button when "UNIT IS" is shown on the LCD.


How to calibrate the Altimeter 
1) Press the set button to enter the menu system (far right button).
2) Press the down button repeatedly until the LCD displays "ALT CAL".
3) Press the set button to begin calibrating the altitude.
4) Use the up and down buttons to set the gauge's altitude to the current actual altitude.
5) Press the set button to save the calibration.
 
Note that the gauge's altimeter is barometric pressure based. Barometric pressure is not only related to altitude, but weather conditions as well, so the gauge may become inaccurate even through the course of a single day.